The COVID-19 pandemic presented several challenges, leaving the specific impact of class closures on student performance unclear. To address this, researchers examined the effect of pre-pandemic class closures due to influenza outbreaks on students’ test scores in Japan. They found that class closures adversely affected the math scores of elementary school boys from low-income households, likely due to lost instructional time and unhealthy behaviors. Fortunately, high-quality teachers could help students recover from the learning loss.

The demand for polymer-based dielectrics with a low dielectric constant and a low dissipation factor is rising, owing to the expansion of 5G and 6G telecommunications networks. However, polymer designs that satisfy both requirements have been difficult to realize. Now, researchers from Japan have developed a new family of ultralow dielectric loss polymers, presenting a new strategy for developing next-generation dielectrics that are suitable for future beyond-6G telecommunications.